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from itsafluke contains these words:

Tried it on my Flymo 300 compact hoover lawn mower 1400W - does not
seem to have enough umph (even thou not cutting anything)

Just what will it drive ???

Well, allegedly at full pelt, 3.5kW, but of course that's a
manufacturer's rating, so in real life it may be considerably less.

--
Skipweasel
Pay no attention to that man behind the curtain.